...>nslookup -type=MX globetworld.com 8.8.8.8
Server:  google-public-dns-a.google.com
Address:  8.8.8.8 
Non-authoritative answer:
globetworld.com MX preference = 0, mail exchanger = smtp.secureserver.net
globetworld.com MX preference = 10, mail exchanger = mailstore1.secureserver.net 
...>
...>telnet smtp.secureserver.net 25 
220 p3plibsmtp01-04.prod.phx3.secureserver.net bizsmtp ESMTP server ready 
500 5.5.1 command unrecognized
HELO MitkoS
250 p3plibsmtp01-04.prod.phx3.secureserver.net hello [*.*.*.*], pleased to
 meet you
MAIL FROM: 
Mitko@Mitko.mitko
550 5.1.0 <mitko@mitko.mitko> Sender rejected. IB506
MAIL FROM: 
Mitko@mitko.com
250 2.1.0 <mitko@mitko.com> sender ok
RCPT TO: 
support@globetworld.com
550 5.1.1 <support@globetworld.com> recipient rejected
RCPT TO: 
info@globetworld.com
550 5.1.1 <info@globetworld.com> recipient rejected
RCPT TO: 
office@globetworld.com
550 5.1.1 <office@globetworld.com> recipient rejected
r
500 5.5.1 command unrecognized
RCPT TO: 
postmaster@globetworld.com
450 4.7.0 too long without DATA command (closing session) 
Connection to host lost. 
...>